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PDF iC-WKL Data sheet ( Hoja de datos )
| Número de pieza | iC-WKL | |
| Descripción | 2.4V CW LASER DIODE DRIVER | |
| Fabricantes | iC-Haus | |
| Logotipo |  |
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iC-WK, iC-WKL
2.4V CW LASER DIODE DRIVER
FEATURES
° CW operation up to 70mA from 2.4..6V supply voltage and
up to 4A with an external power transistor
° Rapid soft start after power-on typical within 70µs
° Simple power adjustment via the external resistor
° Control loop accuracy better than 1% with changes in
temperature, supply voltage and load current
° Integrated reverse polarity protection for the iC and laser
diode
° Strong suppression of transients with very small external
capacitors; integrated flyback path
° Permanent shutdown with excessive temperature and
overcurrent (i.e. if the laser diode is damaged or the
feedback current path fails)
° Two feedback inputs permit all current LD types to be used
(M/P/N configurations)
° Modulation via the feedback inputs is possible
° Wide monitor current range from 10µA to 2.5mA
Rev C2, Page 1/7
APPLICATIONS
° Battery-powered LD modules
° LD Pointers
° Bar-code readers
PACKAGES
SO8
MSOP8
BLOCK DIAGRAM
+2.4..+6V
6 VCC
CVCC
...47nF...
TRANSIENT
PROTECTION
iC-WKL
1
D
LDA 7
CLDA
..1µF..
MDK 4
- MDA 5
+
VREF
0.5V
CI 2
LDK 8
MD LD
NQ
R
GND
RGND 1
0..3
GND
OVER CURRENT/
OVER TEMP.
iC-WK
FEEDBACK MON.
AGND 3
CI RM
200 ..50k
..100nF..
CM
47pF
suitable laser diode configurations: N, P, M
MD LD
MD LD
LD
MD
© 2002
iC-Haus GmbH
Integrated Circuits
Am Kuemmerling 18, D-55294 Bodenheim
Tel +49-6135-9292-0
Fax +49-6135-9292-192
http://www.ichaus.com
1 page  
iC-WK, iC-WKL
2.4V CW LASER DIODE DRIVER
Rev C2, Page 5/7
ELECTRICAL CHARACTERISTICS
S SOperating Conditions: VCC= 2.4..6V, RM= 200 ..50k , Tj= -40..125°C unless otherwise noted
Item Symbol Parameter
Conditions
Tj Fig.
°C
Laser Drive LDA, LDK (continued)
204 toff()
Overcurrent Reset Delay
lack of feedback:
I(RM)= 0 to I(LDK)= It(LDK);
I(LDK)= 20mA, CI= 47nF
I(LDK)= 20mA, CI= 100nF
I(LDK)= 60mA, CI= 47nF
I(LDK)= 60mA, CI= 100nF
205 Vf()
Diode Forward Voltage LDK-LDA I(LDK)< 70mA
206 Rvcc() Transient Protection Resistor VCC vs. LDA
207 Vt(MDA) Shutdown Threshold at MDA
iC-WK only
Control Release Flip-Flop
401 VCCen Set Threshold for Enable
Flip-Flop
402 Toff
Overtemperature Shutdown
Min.
0.56
0.6
125
Typ.
Max.
Unit
85 µs
170 µs
60 µs
130 µs
1.1 V
4S
2V
1.9 V
150 °C
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet iC-WKL.PDF ] | |
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